Against those who suppose Intellect and Sense to be the same

SENSE is found in all animals, but animals other than man have no
intellect: which is proved by this, that they do not work, like
intellectual agents, in diverse and opposite ways, but just as nature
moves them fixed and uniform specific activities, as every swallow
builds its nest in the same way.

2. Sense is cognisant only of singulars, but intellect is cognisant of
universals.

3. Sensory knowledge extends only to bodily things, but intellect takes
cognisance of things incorporeal, as wisdom, truth, and the relations between
objects.

4. No sense has reflex knowledge of itself and its own activity: the
sight does not see itself, nor see that it sees. But intellect is
cognisant of itself, and knows that it understands.*